Explore BrainMass

Explore BrainMass

    Hypothesis testing :Proportion

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    Need help setting up, solving and understanding this problem:

    During the 2004 election year, new polling results were reported daily. In an IBD/TIPP poll of 910 adults, 503 respondents reported that they were optimistic about the national outlook, and The President's leadership index jumped 4.7 points to 55.3.

    a. What is the sample proportion of respondents who are optimistic about the national outlook?

    b. A campaign manager wants to claim that this poll indicates that the majority of adults are optimistic about the national outlook. Construct a hypothesis test so that rejection of the null hypothesis will permit the conclusion that the proportion optimistic is greater than 50%.

    c. Use the polling data to compute the p-value for the hypothesis test in part (b) above. Explain to the manager what this p-value means about the level of significance of the results.

    © BrainMass Inc. brainmass.com June 3, 2020, 8:28 pm ad1c9bdddf
    https://brainmass.com/statistics/hypothesis-testing/hypothesis-testing-proportion-138998

    Solution Preview

    Please see the attached file.

    Statistics: Hypothesis Testing (Problem has been edited, missing info added)

    Need help setting up, solving and understanding this problem:

    During the 2004 election year, new polling results were reported daily. In an IBD/TIPP poll of 910 adults, 503 respondents reported that they were optimistic about the national outlook, and The President's leadership index jumped 4.7 points to 55.3.

    a. What is the sample proportion of respondents who are optimistic about the national outlook?

    The sample proportion is given by =503/910 = 0.5527472

    b. A campaign manager wants to claim that this poll indicates that the majority of adults are optimistic about ...

    Solution Summary

    This shows how to set up and solve an example of a hypothesis testing problem.

    $2.19

    ADVERTISEMENT